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Definitions

serum

[seer-uhm] / ˈsɪər əm /


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Detecting such a strong signal from just 1 milliliter of serum was unexpected.

From Science Daily • Feb. 17, 2026

After years of being mistakenly linked to high serum cholesterol, eggs were rolled out to the public as a “healthy” food by the FDA External link in December 2024 External link.

From Barron's • Dec. 11, 2025

As the YouTube hit demonstrates, hot sauce isn’t just for daredevils and masochists: It’s a truth serum.

From The Wall Street Journal • Nov. 20, 2025

A Marvel Comics staple, Captain America debuted in 1940 as Steve Rogers, a “super-soldier” who was injected with a serum that enhanced his physical abilities.

From Los Angeles Times • Feb. 14, 2025

I still feel a little weight in my limbs from the truth serum Cara, Caleb, and Matthew tested on me earlier, as part of our plan.

From "Allegiant" by Veronica Roth